morrison



up.. 616,797. Patented uw.. 27,1898. I

A. momson.

MANUFABTURE 0F TIE PLATES.

` (Applicativi, med Apr. 1`, was.)

(No Model.) 1 3 Sheets-Shat I.

m: Nonms PETERS co. Pnoauun. wAsnmnToN, u. c,

No. 615,797.- Patented neg.' 27, |893.

. A. mhonmsou. v

MANUFACTUBE UF-TIE PLATES.

(Appliuion med Apr. 1, lass.) H No Model.) 3 Shes-ts-fSheet 2.

PATENT OFFICE.

ANDREW MORRISON, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE DILVVORTH, PORTER & COMPANY, OF SAME PLACE.

IVIANUFACTU RE OF TIE-PLATES.

SPECIFICATION formingpart of Letters Patent No. 616,797, dated December 27, 1898.

' Application led April l,I 1898. Serial No. 676,102. (No model.)

To all whom it may concern.-

Beit known that I, ANDREW MORRISON, of Pittsburg, in the county of Allegheny and State of' Pennsylvania, have invented a new and useful Improvement in the Manufacture of Tie-Plates, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specication, in which- Figures 1 to 8, inclusive, are diagrammatic views showing the shapes of the successive passes through which the metal is forced in the rolling of the tie-plate bars; and Figs. 9 and lO are front elevations of rolls containing passes arranged in accordance with my invention.

My invention relates to the rolling of tieplate bars, wherein the bar is provided near each edge with a right-angled flange or claw 5 and it consists in an improved set of passes for this purpose as well as in the improved method of working the metal in these passes.

In the drawings, Fig. I shows the lirst pass, wherein the plate 2 is formed with outwardlyextending flanges or lips 3 3 and also prefer ably with bumps or longitudinal ridges 4 4. These bumps or ridges, however, may not be used, and I have accordingly shown them in dotted lines, although I find it preferable to employ them. In the second and third passes (shown in Figs. 2 and 3) the plate is elongated and made thinner both in the body and lip portion. In the fourth pass (shown in Fig. et) the lips are tapered and.v bent into a more nearly rightangled position, while in the fifth pass (shown in Fig. 5) they are brought to such right angled position. The plate formed in this fifth pass is of the same width as the final tie-plate and the flanges or claws are at its side edges. In the next or sixth pass (shown in Fig. G) I indent the outer foot portions of the flanges and force the metal of these flanges inwardly in opposite directions,

vat the same time forcing the metal of the pass (shown in Fig. S) the bumps, if employed, are forced entirely into the plate and its flanges, so as to preyent any substantial shortening of the flanges, and the bar is given its final shape with the right-angled flanges set in a short distance from each side thereof.

In Figs. 9 and l0 I show sets of three high rolls having the collars arranged to give the passes a, b, c, d, e, f, g, and h, these passes being shaped to form the metal in the manner above described.

The advantages of my invention result from the fact that by means of this system of rolling much longer anges can be obtained than was formerly possible.

The plate may be rolled with additional ribs or flanges and may be provided with, grooves or corrugations. The forcing in of the flange may be carried out in one or more passes. The bumps may be done away with, and many other changes will suggest themselves to those skilled in the art without departure from my invention, since I consider myself the first to roll a plate of final width with flanges at its side edges and then force these flanges inwardly, so that they are inset fromthe edges in the Iinal plate.

I claim- 1. In the manufacture of tie-plate bars, rolls having preliminary passes arranged to form the plate-body with laterally-projecting flanges, intermediate passes arranged to form the plate of its final width and force the flanges into a substantially right-angled p0- sition at the side edges of the plate, and final passes arranged to force the metal of the flanges inwardly and produce a plate with the flanges set in from its edges, substantially as described.

2. In the manufacture of tie-plate bars,y

rolls having preliminary passes arranged to form a plate with laterally-projecting flanges and opposite bumps, intermediate passes ar ranged to shape the plate of its final width and force the flan ges into a right-angled p0- sition at its side edges, and final passes arranged to inset the flanges from the side edges and force the metal of the bumps into the plate, substantially as described.

IOO

3. In the manufacture of tie-plate bars,

rolls having passes arranged to form a plate with a projecting flange at its side edge, and a final pass or passes arranged to force the metal of the flange inwardly Without substanright-angled flanges at its side edges, and tial widening of the plate, and thus Aproduce bumps opposite thelangesfand then forcing a plate with the flange set in from its edge; the flanges inwardly from the edges and roll- [5 substantially as described. ing the metal of the bumps into the plate 5 4. The method of rolling tie-plate bars and without substantially increasing the width of similar material, consisting in rollinga plate the plate; substantially as described. with a flange at its side edge, and then forcing In testimony whereof I have hereunto set the metal of the flange inwardly from the edge my hand.

without substantially increasing the Width of ANDREW MORRISON. xo the plate; substantially as described. Vitnesses;

5. The method of rolling tie-plate bars, con- C. E. MACKOWN,

sisting in forming a bar with substantially G. I. I-IOLDSHIP. 

